import static org.junit.Assert.*;

import org.junit.Test;


public class MathToolTest {

	@Test

	public void test() {

		assertEquals(1,1);
		assert MathTool.sum(1,2,3) == 6 :"error 1";
		assert MathTool.sum(7,8,9) == 24 :"error 2";
		assert MathTool.sum(-1,0,1) == 0 :"error 3";
		}

}
